mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-07-29 05:50:27 +00:00
Improve memory safety
This commit makes numerous refinements to cosmopolitan memory handling.
The default stack size has been reduced from 2mb to 128kb. A new macro
is now provided so you can easily reconfigure the stack size to be any
value you want. Work around the breaking change by adding to your main:
STATIC_STACK_SIZE(0x00200000); // 2mb stack
If you're not sure how much stack you need, then you can use:
STATIC_YOINK("stack_usage_logging");
After which you can `sort -nr o/$MODE/stack.log`. Based on the unit test
suite, nothing in the Cosmopolitan repository (except for Python) needs
a stack size greater than 30kb. There are also new macros for detecting
the size and address of the stack at runtime, e.g. GetStackAddr(). We
also now support sigaltstack() so if you want to see nice looking crash
reports whenever a stack overflow happens, you can put this in main():
ShowCrashReports();
Under `make MODE=dbg` and `make MODE=asan` the unit testing framework
will now automatically print backtraces of memory allocations when
things like memory leaks happen. Bugs are now fixed in ASAN global
variable overrun detection. The memtrack and asan runtimes also handle
edge cases now. The new tools helped to identify a few memory leaks,
which are fixed by this change.
This change should fix an issue reported in #288 with ARG_MAX limits.
Fixing this doubled the performance of MKDEPS.COM and AR.COM yet again.
This commit is contained in:
Justine Tunney
parent
a0b39f886c
commit
226aaf3547
317 changed files with 6474 additions and 3993 deletions
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@ -19,384 +19,165 @@
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#include "libc/macros.internal.h"
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.source __FILE__
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.macro .acall fn:req
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xor %eax,%eax
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mov $1,%r10b
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cmpxchg %r10b,__asan_noreentry(%rip)
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jnz 2f
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call \fn
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decb __asan_noreentry(%rip)
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2: nop
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.endm
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.rodata.cst4
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__asan_option_detect_stack_use_after_return:
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.long 0
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.endobj __asan_option_detect_stack_use_after_return,globl
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.previous
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.bss
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__asan_noreentry:
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.byte 0
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.endobj __asan_noreentry
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.previous
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__asan_report_load1:
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push %rbp
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mov %rsp,%rbp
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.profilable
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mov $1,%esi
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.acall __asan_report_load
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pop %rbp
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ret
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push $1
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jmp 1f
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.endfn __asan_report_load1,globl
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__asan_report_load2:
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push %rbp
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mov %rsp,%rbp
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.profilable
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mov $2,%esi
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.acall __asan_report_load
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pop %rbp
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ret
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push $2
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jmp 1f
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.endfn __asan_report_load2,globl
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__asan_report_load4:
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push %rbp
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mov %rsp,%rbp
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.profilable
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mov $4,%esi
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.acall __asan_report_load
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pop %rbp
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ret
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push $4
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jmp 1f
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.endfn __asan_report_load4,globl
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__asan_report_load8:
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push %rbp
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mov %rsp,%rbp
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.profilable
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mov $8,%esi
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.acall __asan_report_load
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pop %rbp
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ret
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push $8
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jmp 1f
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.endfn __asan_report_load8,globl
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__asan_report_load16:
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push %rbp
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mov %rsp,%rbp
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.profilable
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mov $16,%esi
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.acall __asan_report_load
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pop %rbp
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ret
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push $16
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jmp 1f
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.endfn __asan_report_load16,globl
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__asan_report_load32:
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push %rbp
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mov %rsp,%rbp
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.profilable
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mov $32,%esi
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.acall __asan_report_load
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pop %rbp
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ret
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push $32
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1: pop %rsi
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0: jmp __asan_report_load
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.endfn __asan_report_load32,globl
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__asan_report_load_n:
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push %rbp
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mov %rsp,%rbp
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.profilable
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.acall __asan_report_load
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pop %rbp
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ret
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jmp 0b
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.endfn __asan_report_load_n,globl
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__asan_report_store1:
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push %rbp
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mov %rsp,%rbp
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.profilable
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mov $1,%esi
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.acall __asan_report_store
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pop %rbp
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ret
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push $1
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jmp 1f
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.endfn __asan_report_store1,globl
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__asan_report_store2:
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push %rbp
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mov %rsp,%rbp
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.profilable
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mov $2,%esi
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.acall __asan_report_store
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pop %rbp
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ret
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push $2
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jmp 1f
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.endfn __asan_report_store2,globl
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__asan_report_store4:
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push %rbp
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mov %rsp,%rbp
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.profilable
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mov $4,%esi
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.acall __asan_report_store
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pop %rbp
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ret
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push $4
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jmp 1f
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.endfn __asan_report_store4,globl
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__asan_report_store8:
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push %rbp
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mov %rsp,%rbp
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.profilable
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mov $8,%esi
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.acall __asan_report_store
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pop %rbp
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ret
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push $8
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jmp 1f
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.endfn __asan_report_store8,globl
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__asan_report_store16:
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push %rbp
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mov %rsp,%rbp
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.profilable
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mov $16,%esi
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.acall __asan_report_store
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pop %rbp
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ret
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push $16
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jmp 1f
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.endfn __asan_report_store16,globl
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__asan_report_store32:
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push %rbp
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mov %rsp,%rbp
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.profilable
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mov $32,%esi
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.acall __asan_report_store
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pop %rbp
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ret
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push $32
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1: pop %rsi
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0: jmp __asan_report_store
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.endfn __asan_report_store32,globl
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__asan_report_store_n:
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push %rbp
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mov %rsp,%rbp
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.profilable
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.acall __asan_report_store
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pop %rbp
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ret
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jmp 0b
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.endfn __asan_report_store_n,globl
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__asan_stack_free_0:
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push %rbp
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mov %rsp,%rbp
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.profilable
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mov $0,%edx
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call __asan_stack_free
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pop %rbp
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ret
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push $0
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jmp 1f
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.endfn __asan_stack_free_0,globl
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__asan_stack_free_1:
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push %rbp
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mov %rsp,%rbp
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.profilable
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mov $1,%edx
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call __asan_stack_free
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pop %rbp
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ret
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push $1
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jmp 1f
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.endfn __asan_stack_free_1,globl
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__asan_stack_free_2:
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push %rbp
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mov %rsp,%rbp
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.profilable
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mov $2,%edx
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call __asan_stack_free
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pop %rbp
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ret
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push $2
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jmp 1f
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.endfn __asan_stack_free_2,globl
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__asan_stack_free_3:
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push %rbp
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mov %rsp,%rbp
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.profilable
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mov $3,%edx
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call __asan_stack_free
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pop %rbp
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ret
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push $3
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jmp 1f
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.endfn __asan_stack_free_3,globl
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__asan_stack_free_4:
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push %rbp
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mov %rsp,%rbp
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.profilable
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mov $4,%edx
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call __asan_stack_free
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pop %rbp
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ret
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push $4
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jmp 1f
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.endfn __asan_stack_free_4,globl
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__asan_stack_free_5:
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push %rbp
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mov %rsp,%rbp
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.profilable
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mov $5,%edx
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call __asan_stack_free
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pop %rbp
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ret
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push $5
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.endfn __asan_stack_free_5,globl
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__asan_stack_free_hop:
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1: pop %rdx
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jmp __asan_stack_free
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.endfn __asan_report_store_n,globl
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__asan_stack_free_6:
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push %rbp
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mov %rsp,%rbp
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.profilable
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mov $6,%edx
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call __asan_stack_free
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pop %rbp
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ret
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push $6
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jmp 1b
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.endfn __asan_stack_free_6,globl
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__asan_stack_free_7:
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push %rbp
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mov %rsp,%rbp
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.profilable
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mov $7,%edx
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call __asan_stack_free
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pop %rbp
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ret
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push $7
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jmp 1b
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.endfn __asan_stack_free_7,globl
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__asan_stack_free_8:
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push %rbp
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mov %rsp,%rbp
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.profilable
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mov $8,%edx
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call __asan_stack_free
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pop %rbp
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ret
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push $8
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jmp 1b
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.endfn __asan_stack_free_8,globl
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__asan_stack_free_9:
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push %rbp
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mov %rsp,%rbp
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.profilable
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mov $9,%edx
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call __asan_stack_free
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pop %rbp
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ret
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push $9
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jmp 1b
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.endfn __asan_stack_free_9,globl
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__asan_stack_free_10:
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push %rbp
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mov %rsp,%rbp
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.profilable
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mov $10,%edx
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call __asan_stack_free
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pop %rbp
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ret
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push $10
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jmp 1b
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.endfn __asan_stack_free_10,globl
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__asan_stack_malloc_0:
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push %rbp
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mov %rsp,%rbp
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.profilable
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mov $0,%esi
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call __asan_stack_malloc
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pop %rbp
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ret
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push $0
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jmp 1f
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.endfn __asan_stack_malloc_0,globl
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__asan_stack_malloc_1:
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push %rbp
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mov %rsp,%rbp
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.profilable
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mov $1,%esi
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call __asan_stack_malloc
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pop %rbp
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ret
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push $1
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jmp 1f
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.endfn __asan_stack_malloc_1,globl
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__asan_stack_malloc_2:
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push %rbp
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mov %rsp,%rbp
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.profilable
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mov $2,%esi
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call __asan_stack_malloc
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pop %rbp
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ret
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push $2
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jmp 1f
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.endfn __asan_stack_malloc_2,globl
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__asan_stack_malloc_3:
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push %rbp
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mov %rsp,%rbp
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.profilable
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mov $3,%esi
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call __asan_stack_malloc
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pop %rbp
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ret
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push $3
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jmp 1f
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.endfn __asan_stack_malloc_3,globl
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__asan_stack_malloc_4:
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push %rbp
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mov %rsp,%rbp
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.profilable
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mov $4,%esi
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call __asan_stack_malloc
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pop %rbp
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ret
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push $4
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jmp 1f
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.endfn __asan_stack_malloc_4,globl
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__asan_stack_malloc_5:
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push %rbp
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mov %rsp,%rbp
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.profilable
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mov $5,%esi
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call __asan_stack_malloc
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pop %rbp
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ret
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push $5
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jmp 1f
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.endfn __asan_stack_malloc_5,globl
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__asan_stack_malloc_hop:
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1: pop %rsi
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jmp __asan_stack_malloc
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.endfn __asan_report_store_n,globl
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__asan_stack_malloc_6:
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push %rbp
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mov %rsp,%rbp
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.profilable
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mov $6,%esi
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call __asan_stack_malloc
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pop %rbp
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ret
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push $6
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jmp 1b
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.endfn __asan_stack_malloc_6,globl
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__asan_stack_malloc_7:
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push %rbp
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mov %rsp,%rbp
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.profilable
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mov $7,%esi
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call __asan_stack_malloc
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pop %rbp
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ret
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push $7
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jmp 1b
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.endfn __asan_stack_malloc_7,globl
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__asan_stack_malloc_8:
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push %rbp
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mov %rsp,%rbp
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.profilable
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mov $8,%esi
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call __asan_stack_malloc
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pop %rbp
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ret
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push $8
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jmp 1b
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.endfn __asan_stack_malloc_8,globl
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__asan_stack_malloc_9:
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push %rbp
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mov %rsp,%rbp
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.profilable
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mov $9,%esi
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call __asan_stack_malloc
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pop %rbp
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ret
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push $9
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jmp 1b
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.endfn __asan_stack_malloc_9,globl
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__asan_stack_malloc_10:
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push %rbp
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mov %rsp,%rbp
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.profilable
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mov $10,%esi
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call __asan_stack_malloc
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pop %rbp
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ret
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push $10
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jmp 1b
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.endfn __asan_stack_malloc_10,globl
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__asan_version_mismatch_check_v8:
|
||||
|
|
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Reference in a new issue